To access this service you must have some setting on your mobile, which connects you to Airtel server for Internet and provides a authentication. To get the setting directly to your mobile just SMS "MO" (Withot Quotes) to 2567 [Toll Free]. Within few Minutes [or sometimes Hours] you will get those setting to your mobile.
Airtel will send those "Airtel Live" and "Airtel GPRS" [Mobile office] and "Airtel MMS" setting to your mobile free of cost in form of SMS, you need to save them and activate any of the service to use it.
To activate the Airtel GPRS [i.e. Mobile office] Just send "GPRSACT" (Withot Quotes) to 511[Toll Free]. Within 4Hrs your Airtel GPRS will be activated. To deactivate it send "GPRSDEACT" (Withot Quotes) to 511 [Toll Free] and your service will be deactivated within 4Hrs. To use this service you must have balance of 15Rs+. and it will charge you 15Rs/Day.
To activate the Airtel LIVE Just send "LIVEACT" (Withot Quotes) to 511[Toll Free]. Within 4Hrs your Airtel LIVE will be activated. To deactivate it send "LIVEDEACT" (Withot Quotes) to 511 [Toll Free] and your service will be deactivated within 4Hrs. Same for this service, to use this service you must have balance of 15Rs+. and there is NO CHARGE for activating this service, You will be charged per KB you download.

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Related Questions:

PUK stands for Personal Unblocking Key. This is a uniqueeight-digit code specific to your SIM card. This is required when the PINnumber to unlock your mobile phone is entered incorrectly 3 times. You are thengiven 10 attempts to enter your PUK code. If an incorrect PUK code is enteredafter the 10th attempt, you will block your SIM card permanently and willrequire a new SIM card from your mobile phone provider.PUK codes can be obtained through the following ways -The PUK code is in your SIM card documentation Starter Pack.If you do not have this then -Please contact your phone service provider.Your cell phone service provider can give you the PUK code once you give themyour account details and they have confirmed your identity.For details to obtain the PUK code for the SIM card, pleaseclick on this link and follow my instructions.http://www.fixya.com/support/r5705889-puk_code

Few people use PIN locking system to lock their phone to avoid
un-authorised access. Though this is a good option, it pisses you off
sometime. Three wrong entry of PIN code will result in SIM blocking.
Once SIM gets blocked, phone starts asking PUK code to enter. If you
again enter wrong code for three times, SIM gets completely blocked. You
have to walk into your service provider outlet to get a replacement SIM
card.
PUK code is a SIM specific code assigned by your service provider. No
way you can guess & enter it. So, when it asks for the PUK code,
don't do anything, get the PUK code from your service provider. Airtel has a easier way of getting PUK code. For getting PUK code of a Airtel number, send PUK<space>PhoneNumber to toll free number 121. You can make use of any other Airtel number to send this message since your SIM might have been blocked already.
If the above method doesn't works or your service provider is not Airtel, call to customer care using any other mobile
phone which uses the same service provider. They will ask some details
about you to make sure you are the owner of the SIM card. Questions
might include your billing address, email ID, numbers you recently
called or messaged etc. They might even ask you number printed on the
SIM card, so be prepared with all details before calling them. Once you
get the PUK code, enter it into the phone & your phone will return
to normal

it is easy to get!
call the service provider of your sim card like airtel customer care if using airtel, vodafone helpdesk if using vodafone!! then will ask u the number, sim number which is on the sim card and the name of the registered owner!!
for futher help reply with details!
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